SGER: Drilling for Stardust: Technology to Collect 100,000-yr Time-Sequenced Records of Micrometeorites

SGER：星尘钻探：收集 10 万年微陨石时间序列记录的技术

• 批准号: 0443799
• 负责人: James Lever
• 金额: --
• 依托单位: Department of Army Cold Regions Research & Engineering Lab
• 依托单位国家: 美国
• 项目类别: Interagency Agreement
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2006-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0443799&HistoricalAwards=false
• 关键词: SGER; Drilling; Stardust; Technology; Collect

This project will design, build and calibrate a collector to obtain time-sequenced records of micrometeorites and terrestrial dust during hot-water drilling through polar ice caps. Micrometeorites are extraterrestrial dust particles less than a millimeter in diameter. Knowledge of the Earth's micrometeorite flux is critical to understanding its chemical evolution. Furthermore, micrometeorites provide important information on the formation and evolution of stars, solar systems, and planets. The prototype collector will serve as a one third scale model of one proposed for use during large scale drilling projects. It will also be operational in its own right for use with small hot-water drills. The collector functions as a replacement to an existing hot-water drill head. It extracts particles from ice onto a self-contained scrolling filter. This project will focus on two critical proof-of-concept issues: (1) collection efficiency and time resolution of the scrolling filter and (2) performance of the shaped drill head. The broader impacts of this work include development of new research infrastructure and support for the participation of two undergraduate students.

该项目将设计、建造和校准一个收集器，以在热水钻探极地冰盖期间获得微陨石和陆地尘埃的时间序列记录。微陨石是直径小于一毫米的外星尘埃颗粒。了解地球微陨石通量对理解其化学演化至关重要。此外，微陨石为恒星、太阳系和行星的形成和演化提供了重要信息。原型收集器将作为大型钻井项目中使用的收集器的三分之一比例模型。它也可以独立运行，用于小型热水钻机。收集器的功能是替代现有的热水钻头。它将冰块中的颗粒提取到一个独立的滚动过滤器上。该项目将重点关注两个关键的概念验证问题：(1)滚动过滤器的收集效率和时间分辨率；(2)异形钻头的性能。这项工作的更广泛的影响包括发展新的研究基础设施和支持两名本科生的参与。